Heat dissipation fin set

ABSTRACT

A heat dissipation fin set includes a first fin; and a second fin. The second fin is adjacent to and parallel to the first fin. A projection plane is defined as being parallel to the first fin and the second fin. If the first fin and the second fin are projected onto the projection plane to form a plurality of projection profiles respectively, the plurality of projection profiles are different from each other.

CROSS-REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 201410707240.5 filed in China on Nov. 27, 2014, the entire contents of which are hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Technical Field of the Invention

The disclosure relates to a heat dissipation fin set, and more particularly to a heat dissipation fin set with multiple heat dissipation fins.

2. Description of the Related Art

With the development of technology in recent years, speeds of computing of electronic devices are faster than before, and the electronic devices are miniaturized. In order to meet the requirement of consumers, the electronic devices are developed to be smaller in size and light in weight.

When the speed of computing of the electronic device is increased, much heat is generated accordingly. In order to dissipate the heat generated, a better heat dissipation module is disposed for conducting the heat generated from heat sources of the electronic device. For example, the heat dissipation is a fan, a heat dissipation fin set, a heat pipe or combinations thereof. Specifically, on the one hand, the fan can drive an air flow to perform heat dissipation on the heat sources through heat convection. On the other hand, the heat dissipation fin set and the heat pipe can be thermally connected with the heat sources for removing the heat.

However, since the electronic devices become smaller and lighter than before, there is no enough spare room within the electronic device to perform heat convection, and larger heat dissipation fin set and the heat pipe are not allowed to be disposed therein. Moreover, the heat dissipation fin set comprises multiple heat dissipation fins, when the air flow passes between every two of the heat dissipation fins adjacent to each other, the air flow may produce several boundary layers each being formed on the heat dissipation fins and their shape are parabolic-shaped. The closer the air flow to the heat dissipation fin set is, the lower the velocity of the air flow is. Accordingly, when the velocity of the air flow is reduced, the air flow cannot efficiently dissipate the heat swiftly, thereby affecting the total efficiency of the heat dissipation.

All in all, manufacturers try to develop the heat dissipation with better efficiency when the electronic devices are miniaturized.

SUMMARY OF THE INVENTION

An aspect of the disclosure provides a heat dissipation fin set comprising a first fin; and a second fin. The second fin is adjacent to and parallel to the first fin. A projection plane is defined as being parallel to the first fin and the second fin. If the first fin and the second fin are projected onto the projection plane to form a plurality of projection profiles respectively, the plurality of projection profiles are different from each other.

Another aspect of the disclosure provides heat dissipation fin set comprising a plurality of heat dissipation fins. A projection plane having a normal line is defined such that the normal line is perpendicular to surfaces of the plurality of heat dissipation fins. If any two heat dissipation fins that are adjacent to each other are projected onto the projection plane to form a plurality of projection profiles respectively, the plurality of projection profiles are different from each other.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only and thus are not limitative of the present disclosure and wherein:

FIG. 1 is a schematic perspective view of a heat dissipation fin set according to an embodiment of the disclosure;

FIG. 2 is an exploded view of the heat dissipation fin set according to the embodiment of the disclosure;

FIG. 3 is a front view of the heat dissipation fin set according to the embodiment of the disclosure;

FIG. 4 is a front view of a third fin according to the embodiment of the disclosure;

FIG. 5 is a front view of a first fin according to the embodiment of the disclosure;

FIG. 6 is a front view of a second fin according to the embodiment of the disclosure; and

FIG. 7 is a cross-sectional view of the heat dissipation fin set along a line 7-7 of FIG. 3.

DETAILED DESCRIPTION

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.

The disclosure provides a heat dissipation fin set which is adapted to electronic devices, such as, but not limited to, a desktop computer, a server, a laptop computer, an all-in-one computer, a smart phone (i.e., a handset). In this disclosure, the heat dissipation fin set is for performing heat dissipation on a heat source of an electronic device.

The following introduces the heat dissipation fin set. Please refer to FIG. 1 to FIG. 3. FIG. 1 is a schematic perspective view of a heat dissipation fin set according to an embodiment of the disclosure, FIG. 2 is an exploded view of the heat dissipation fin set according to the embodiment of the disclosure, and FIG. 3 is a front view of the heat dissipation fin set according to the embodiment of the disclosure;

According to an embodiment of the disclosure, a plurality of heat dissipation fin sets 1 is arranged in sequence. Each heat dissipation fin set 1 comprises a first side 14 and a second side 15 that are opposite to each other. Arranged sequentially, the plurality of heat dissipation fin sets 1 is disposed in a line (i.e., in a row), an air flow can flow through the plurality of heat dissipation fin sets 1 from the first side 14 to the second side 15 or from the second side 15 to the first side 14. In this embodiment of the disclosure, each heat dissipation fin set 1 comprises a plurality of heat dissipation fins, that is, a first fin 12 and a second fin 13. The first fin 12 and the second fin 13 are arranged in a line face-to-face and parallel to each other. In this and some other embodiments, the heat dissipation fin set 1 further comprises a third fin 11 located at a side of the heat dissipation fin set 1 and parallel to the first fin 12. In other words, the first fin 12 is located between the third fin 11 and the second fin 13. Furthermore, the first fin 12, the second fin 13 and the third fin 11 have a first surface 122, a second surface 132 and a third surface 112, respectively. In this disclosure, a projection plane has a normal line being defined such that the normal line is perpendicular to the first surface 122 of the first fin 12, the second surface 132 of the second fin 13, and the third surface 112 of the third fin 11 of the heat dissipation fin set 1. In other words, the first surface 122 of the first fin 12, the second surface 132 of the second fin 13, and the third surface 112 of the third fin 11 of the heat dissipation fin set 1 are substantially parallel to each other. In addition, the first surface 122, the second surface 132 and the third surface 112 face in the same direction, and the disclosure is not limited thereto. It should be noted that in each of the heat dissipation fin set 1, the first fin 12, the second fin 13 and the third fin 11 each project a projection profile onto the projection plane. These projection profiles are different from each other onto the projection plane. In other words, shapes and silhouettes of the first surface 122 of the first fin 12, the second surface 132 of the second fin 13 and the third surface 112 of the third fin 11 of the heat dissipation fin set 1 are different from each other.

In this disclosure, the first fin 12, the second fin 13 and the third fin 11 have different shapes and silhouettes. When air flows passes through channels between every two of the third fin 11, the first fin 12 and the second fin 13 that are adjacent to each other, boundary layers formed on surfaces of the third fin 11, the first fin 12 and the second fin 13 can be destroyed, thereby reducing the probabilities of the decrease of the velocity of the air flows. That is to say, the configuration of the third fin 11, the first fin 12 and the second fin 13 maintains the turbulences of the air flows, thereby speeding up the air flow. Thus, the total efficiency of the heat dissipation of the heat dissipation fin set 1 is enhanced.

The following describes the combination manner of the fins, and take the third fin 11 as an example. Please refer to FIG. 2 and FIG. 4, and FIG. 4 is a front view of a third fin according to the embodiment of the disclosure. In this and some other embodiments, the third fin 11 comprises a main body 113, a first connecting section 114 and a second connecting section 115. The first connecting section 114 and the second connecting section 115 are connected to two sides of the main body 113 that are opposite to each other, and a shape of the third fin 11 is U-shaped. Thus, the first connecting section 114 and the second connecting section 115 of the third fin 11 can be fastened to the second fin 13 which is adjacent to the third fin 11 by attachment, adherence or welding. Consequently, the main body 113, the first connecting section 114 and the second connecting section 115 of the third fin 11 and the adjacent second fin 13 form a channel therein together. Through this structure, every two of the third fin 11, the first fin 12 and the second fin 13 that are adjacent to each other can be connected to (i.e., bridge) each other as well as forming the channel therebetween. However, the disclosure is not limited to above-mentioned structure. For example, in other embodiments, the heat dissipation fin set 1 further comprises a carrying plate, and the third fin 11 only comprises the main body 113 erected on the carrying plate. Moreover, in this and some other embodiments, the third fin 11 further has a third guiding hole 111 disposed at the main body 113. The heat dissipation fin set 1 further comprises a heat pipe 20 with one end being contact with a heat source, e.g. a central processing unit or a chip, of the electronic device and with the other end penetrating the third guiding hole 111 of the third fin 11 of the heat dissipation fin set 1.

Moreover, as shown in FIG. 4, the shape of the third fin 11 is symmetrical to a central axis C1 of the third fin 11, but the disclosure is not limited to the symmetry of the shape of the third fin 11. In other embodiments, the shape of the third fin 11 is not symmetrical to a central axis C1 of the third fin 11 but asymmetrical and irregular.

The following describes the configurations of the first fin 12 and the second fin 13, please refer to FIG. 5, which is a front view of a first fin according to the embodiment of the disclosure. In this and some other embodiments, each first fin 12 has a first guiding hole 121 where the heat pipe 20 can penetrate. In this and some other embodiments, each first fin 12 has four first through holes 123, 124, 125 and 126. The first through holes 123, 124, 125 and 126 are disposed around the first guiding hole 121. Two sides (i.e., the first side 14 and the second side 15 shown in FIG. 1) of the first fin 12 adjacent to each other has first recesses 127 and 128, respectively. The first recesses 127 and 128 are formed towards a central axis C2 from the first side 14 and the second side 15, respectively.

The first fin 12 and the second fin 13 also have components similar to the first connecting section 114 and second connecting section 115 of the third fin 11. Thus, the third fin 11, the first fin 12 and the second fin 13 are connected to each other through these components. Since the configurations of the first connecting section and the second connecting section of the first fin 12 and the second fin 13 are similar to that of the third fin 11, the repeated description is not described again herein.

Please refer to FIG. 6, which is a front view of a second fin according to the embodiment of the disclosure. In this and some other embodiments, the second fin 13 has a second guiding hole 131 where the heat pipe 20 can penetrate. Heat generated by the heat source can be directly conducted to the second fin 13 through the heat pipe 20. Then the heat can be evenly transmitted to the third fin 11, the first fin 12 and the second fin 13 of each heat dissipation fin set 1 via heat conduction. In this and some other embodiments, since the third fin 11, the first fin 12 and the second fin 13 of the heat dissipation fin set 1 are arranged in a line and the heat pipe 20 is a straight tube, the projection profiles projected by the third guiding hole 111 of the third fin 11, the first guiding hole 121 and the first fin 12 and the second guiding hole 131 of the second fin 13 are formed onto the projection plane and overlapped (namely, match) with each other.

In this and some other embodiments, each second fin 13 further has two second through holes 133 and 135 and two third through holes 134 and 136. The second through holes 133 and 135 and the third through holes 134 and 136 are disposed around the second guiding holes 131. Dimensions (e.g., shapes, silhouettes and sizes) of the second through holes 133 and 135 are different from dimensions (e.g., shapes, silhouettes and sizes) of the third through holes 134 and 136. In this embodiment, a central axis C3 of the second fin 13 penetrates through the third through holes 134 and 136. Shortest distances L1 between the first through holes 123, 124, 125 and 126 and the central axis C2 of the first fin 12 are different from shortest distances L2 between the second through holes 133 and 135 and the central axis C3 of the second fin 13. Moreover, in this and some other embodiments, two sides (i.e., the first side 14 and the second side 15 shown in FIG. 1) of the second fin 13 that are opposite to each other have two second recesses 137 and 138, respectively. The two second recesses 137 and 138 formed toward the central axis C3 from the first side 14 and the second side 15, respectively. Please refer to FIG. 5 and FIG. 6, shortest distances L3 between the first recesses 127 and 128 and the central axis C2 of the first fin 12 are different from shortest distances L4 between the second recesses 137 and 138 and the central axis C3 of the second fin 13. In addition, shapes of the first fin 12 and the second fin 13 are symmetrical to the central axes C2 and C3, respectively, but the disclosure is not limited to these symmetrical shapes. In other embodiments, the shapes of the first fin 12 and second fin 13 are not symmetrical to the central axes C2 and C3 but asymmetrical or irregular.

Furthermore, in some embodiments, the heat dissipation fin set 1 further comprises a fan (not shown, e.g., a centrifugal fan) disposed at the first side 14 of the heat dissipation fin set 1. Hence, the fan is for driving an air flow to flow from the first side 14 towards the second side 15 through the channels between the third fin 11, the first fin 12 and the second fin 13. Accordingly, the heat accumulated in the third fin 11, the first fin 12 and the second fin 13 can be removed away. Thanks to the disposition of the fan, the efficiency of the heat dissipation of the heat dissipation fin set 1 is enhanced.

In short, the first fin 12 comprises the first through holes 123, 124, 125 and 126 and the first recesses 127 and 128, and the second fin 13 comprises the second through holes 133 and 135, the third through holes 134 and 136 and the second recesses 137 and 138. Thus, it means the shapes of the third fin 11, the first fin 12 and the second fin 13 are different from each other, such that the third fin 11, the first fin 12 and the second fin 13 that are adjacent to each other form multiple holes which stagger with each other (i.e., the first through holes 123, 124, 125 and 126, the first recesses 127 and 128, the second through holes 133 and 135, the third through holes 134 and 136, and the second recesses 137 and 138). Please refer to FIG. 7, which is a cross-sectional view of the heat dissipation fin set along a line 7-7 of FIG. 3. When air flows are generated to flow along a first direction D1 from the first side 14 towards the second side 15 of the heat dissipation fin set 1, the air flows can pass through or pass by the first through holes 123 and 126, the first recesses 127 and 128, the second through holes 133 and 135, the third through hole 136, and the second recesses 137 and 138. Turbulences of the air flows are generated within the channels between the third fin 11, the first fin 12 and the second fin 13, destroying the growth of the boundary layers. Thus, the velocities of the air flows on the surfaces of the third fin 11, the first fin 12 and the second fin 13 are increased, enhancing the efficiency of the heat dissipation of the heat dissipation fin set 1.

Moreover, the heat dissipation fin set 1 according the above-mentioned embodiments comprises the first fin 12, the second fin 13 and the third fin 11, but the disclosure is not limited to the quantity, the type and the arrangement of the fins. For example, two third fins 11 are disposed at two sides of the heat dissipation fin set 1, and the first fin 12 and the second fin 13 stagger therein. Alternatively, for example, the heat dissipation fin set 1 further comprises a fourth fin with a fourth through hole and a fifth fin with a fifth through hole. The first fin 12, the second fin 13, the fourth fin and the fifth fin randomly disposed inside the heat dissipation fin set 1. In other embodiments, the fins of the heat dissipation fin set 1 are randomly arranged with each other. In short, when projections regions projected by the fins (e.g., the first fin 12, the second fin 13 and the third fin 11) of the heat dissipation fin set 1 are different from each other onto the projection plane in order to destroy the growth of the boundary layers on the surfaces of the fins, this kind of heat dissipation fin set 1 belongs to the scope of the present disclosure.

According to the embodiments of the disclosure, the heat dissipation fin set comprises the first fin and the second fin, both projecting the projection profiles onto the projection plane, and the projection profiles are different from each other. Consequently, when an air flow passes through the heat dissipation fin set, the first fin and the second fin can destroy the growth of the boundary layers formed on the surfaces thereof, solving the problem that the velocity of the air flow may decreased due to the boundary layer. Thus, the efficiency of the heat dissipation is enhanced. 

What is claimed is:
 1. A heat dissipation fin set, comprising: a first fin; and a second fin being adjacent to and parallel to the first fin; wherein a projection plane is defined as being parallel to the first fin and the second fin, if the first fin and the second fin are projected onto the projection plane to form a plurality of projection profiles respectively, the plurality of projection profiles are different from each other.
 2. The heat dissipation fin set according to claim 1, further comprising a third fin located at a side of the heat dissipation fin set and being parallel to the first fin.
 3. The heat dissipation fin set according to claim 2, further comprising a heat pipe, the first fin comprising a first guiding hole, the second fin comprising a second guiding hole, the third fin comprising a third guiding hole, and the heat pipe penetrating through the first guiding hole, the second guiding hole and the third guiding hole.
 4. The heat dissipation fin set according to claim 3, wherein if the third guiding hole, the first guiding hole and the second guiding hole are projected onto the projection planes to form the plurality of projection profiles respectively, the plurality of projection profiles corresponding to the third guiding hole, and the first guiding hole and the second guiding hole are overlapped with each other.
 5. The heat dissipation fin set according to claim 4, wherein the first fin comprises a plurality of first through holes disposed around the first guiding hole, and the second fin comprises a plurality of second through holes disposed around the second guiding hole.
 6. The heat dissipation fin set according to claim 3, wherein the first fin comprises four first through holes disposed around the first guiding hole.
 7. The heat dissipation fin set according to claim 6, wherein the second fin comprises two second through holes and two third through holes, the second through holes and the third through holes are together disposed around the second guiding hole, and dimensions of the second through holes are different from dimensions of the third through holes.
 8. The heat dissipation fin set according to claim 1, wherein the first fin comprises two first recesses located on two sides of the first fin that are opposite to each other.
 9. The heat dissipation fin set according to claim 8, wherein the second fin comprises two second recesses located on two sides of the second fin that are opposite to each other, and shortest distances between each first recess and a central axis of the heat dissipation fin set are different from shortest distances between the second recess and the central axis.
 10. A heat dissipation fin set, comprising a plurality of heat dissipation fins, a projection plane having a normal line being defined such that the normal line is perpendicular to surfaces of the plurality of heat dissipation fins, if any two heat dissipation fins that are adjacent to each other are projected onto the projection plane to form a plurality of projection profiles respectively, the plurality of projection profiles are different from each other. 